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Congratulations to Maia Shibutani and Alex Shibutan, the first-ever U.S. siblings to win an Olympic ice dance medal! Learn why figure skaters must be aware of their center of mass, which affects the balance and stability of every jump, spin and lift they perform.

NBC Learn is always adding new resources for your classroom, not only from this week’s news, but also from past decades. In this documentary from 1966, NBC News reports on various political fringe organizations both on the far left and the far right.

RECENTLY ADDED

Date : 02/21/2018

Clip Length : 00:04:41

The Reverend Billy Graham, known as "America's Pastor," passes away at the age of 99. Graham transformed American religious life through his preaching and activism, reaching millions of people by embracing radio, television and the internet.

In response to the 2018 Parkland school shooting, President Donald Trump is directing the Department of Justice to impose regulations banning bump stocks, the devices allowing some guns to shoot hundreds of rounds per minute. On February 14, 2018, former student Nikolas Cruz entered Marjory Stoneman Douglas High School with an AR-15 semiautomatic rifle and opened fire, killing at least 17 teachers and students in Parkland, Florida.

Students are taking hold of the gun debate in the wake of the school shooting in Parkland, Florida, by organizing a series of school walkouts across the country and a march in Washington to protest gun violence. On February 14, 2018, former student Nikolas Cruz entered Marjory Stoneman Douglas High School with an AR-15 semiautomatic rifle and opened fire, killing at least 17 teachers and students.

In Congress, a proposal, which was drafted in response to the 2017 Las Vegas shooting, will force federal agencies to improve their reporting of things like criminal convictions to make sure they come up on gun background checks. However, it would not have stopped Nikolas Cruz, who killed at least 17 students and teachers in the 2018 Parkland School Shooting on February 14, 2018.

President Donald Trump does not mention guns in his statement on the Parkland, Florida school shooting, focusing on the mental health of shooters rather than the weapons they use. On February 14, 2018, former student Nikolas Cruz entered the school with an AR-15 semiautomatic rifle and opened fire, killing at least 17 teachers and students.

On a tiny island on the southernmost tip of South Korea, a group of powerful “women of the sea” called the Haenyeo sustain themselves exclusively from the ocean as they dive for seaweed, shellfish and octopus. They dive without oxygen tanks and can hold their breath up to two minutes, keeping an ancient tradition alive while braving highly dangerous conditions.

In Everett, Washington, 18-year-old Joshua O’Connor is arrested after his grandmother finds a journal detailing plans to attack a high school and calls 911. Due to the violent nature of this story, it may not be appropriate for younger viewers.

President Donald Trump's daughter Ivanka Trump, Jared Kushner, social media director Dan Scavino and over 130 political appointees did not have permanent security clearance as of November 2017, though they still had access to sensitive documents.

President Donald Trump addresses the nation after the mass shooting at Marjory Stoneman Douglas High School in Parkland, Florida. On February 14, 2018, former student Nikolas Cruz entered the school with an AR-15 semiautomatic rifle and opened fire, killing 17 teachers and students. This is the full, unedited speech.

Featured this Month

Date : 04/12/2017

Clip Length : 00:03:20

Henrietta Lacks transformed modern medicine with her cells, but most people don’t know who she is. Oprah Winfrey hopes to change that with a new HBO film about Lacks’ life and family. Cells taken from the body of Lacks without her knowledge were used to establish the HeLa cell line, which has been used extensively in medical research.

From the formula used to figure figure-skating scores to the calculus used to figure instantaneous velocities in a speed-skating race, arithmetic and math are part of every Winter Olympic event and every move Olympic athletes make on snow or ice. NSF-funded mathematician Edward Burger from Williams College explains some of the math you can see in Olympic sports, with assistance from figure-skating expert and sports scientist Deborah King of Ithaca College, and U.S. hockey player Ryan Miller.

Sending the 42-lb. granite curling stone down a long sheet of ice toward the center of a bull's-eye target is all about friction and surface physics, as NSF-funded scientists Sam Colbeck, formerly from the U.S. Army Cold Regions Lab, and physicist George Tuthill from Plymouth State University explain, with help from Olympic hockey player John Shuster, and Iain Hueton, from the Ogden Curling Club in Ogden, Utah.

Author Maya Angelou, speaking on behalf of a group of 48 prominent black writers, argues that fellow novelist Toni Morrison, author of "Beloved," has not been awarded the book prizes and respect she deserves.

Figure skaters must be aware of their center of mass, which affects the balance and stability of every step, jump, spin, and lift that the skaters perform. “Science and Engineering of the 2014 Olympic Winter Games” is produced in partnership with the National Science Foundation.

With World War II looming, the first African-American pilots are admitted into the U.S. Armed Forces. Fighter pilots Robert Friend and William Holloman fly their North American P-51 Mustangs as they bravely escort bomber planes across enemy lines while still facing social injustice in the military and at home. "Chronicles of Courage: Stories of Wartime and Innovation" is a co-production of Vulcan Productions and NBC Learn.

NBC's Lester Holt looks at the physically demanding pre-season ritual of NFL training camp. Douglas Casa, head of the Korey Stringer Institute at the University of Connecticut, and athletic trainers from the Pittsburgh Steelers explain what NFL players must do to stay hydrated and replenish the essential nutrients needed to maintain good health during rigorous practices. "Science of NFL Football" is a 10-part video series funded by the National Science Foundation and produced in partnership with the National Football League.

George Washington is often called the father of his nation because he was the first president of the United States. However, Washington's leadership qualities were best displayed during his command of the Continental Army during the American Revolution. This story is produced by NBC Learn in partnership with Pearson.

There have been countless stories told about the men of America's space program, but the new film "Hidden Figures" profiles the surprising women who helped send NASA to space. This video is part of an NBC News series "Inspiring America."

NBC Learn original series

Date : 01/09/2014

Clip Length : 00:05:07

Figure skaters must be aware of their center of mass, which affects the balance and stability of every step, jump, spin, and lift that the skaters perform. “Science and Engineering of the 2014 Olympic Winter Games” is produced in partnership with the National Science Foundation.

The Olympic Winter Games are a showcase of human movement and athletic achievement. Raffaello D'Andrea of the Swiss Federal Institute of Technology draws inspiration from Olympic athletes with the quadrocopter, a flying robotic device that has the ability to learn and improve its performance over time. "Science and Engineering of the 2014 Olympic Winter Games" is produced in partnership with the National Science Foundation.

Skis used by Olympic Alpine and Nordic skiers are made of fiberglass and polymers, engineered by materials scientists to give skis used in different events the flexibility, stability and torsional rigidity required. NSF-funded scientists Melissa Hines, Director of the Cornell University Center for Materials Research, and Kathy Flores, an Ohio State University materials scientist, explain how skis are made, from the core to the ski base, with help from three members of the U.S Olympic Ski Team: Julie Mancuso, Scott Macartney and Ted Ligety.

NSF-funded scientists Paul Doherty, Deborah King, and George Tuthill, along with bobsled designer Bob Cuneo, use an Olympic bobsled run, from starting push to the finish line, to illustrate acceleration, velocity, gravity, and drag.

Ski-jumping--hurtling down a ramp at speeds of 60 mph, then soaring through the air--is an excellent illustration of the aerodynamic forces of lift and drag. NSF-funded scientists Paul Doherty, of The Exploratorium in San Francisco, and physicist George Tuthill of Plymouth State University, explain, along with U.S. ski team members Todd Lodwick and Bill Demong.

The physics behind the awesome, gasp-worthy tricks snowboarders do in the half-pipe? Gravity, friction, and energy (potential and kinetic), as explained by NSF-funded scientists Paul Doherty at The Exploratorium in San Francisco and Deborah King, from the Dept. of Exercise and Sports Sciences at Ithaca College.

A downhill ski race is a tour de force--emphasis on force: from the forceful push-off that accelerates the alpine skier down the slope, to the forces of gravity, friction and wind or air resistance. NSF-funded scientists Paul Doherty of The Exploratorium in San Francisco, and Sam Colbeck, formerly of the U.S. Army Cold Regions Lab, explain the physics of alpine skiing, with help from four members of the U.S. Ski Team: Ted Ligety, Marco Sullivan, Scott Macartney and Julia Mancuso.

The chemistry and materials science used to create aerodynamic competition suits is described by NSF-funded scientists Melissa Hines of Cornell, Troy Flanagan of the U.S. Ski and Snowboard Association, and U.S. Olympic speed skaters Trevor Marsicano and Chad Hedrick; U.S. luge team members Erin Hamlin and Mark Grimmette; U.S. ski team members Scott Macartney and Anders Johnson; and U.S. bobsledder Steve Holcomb.

Skates used by Olympic speed skaters, figure skaters and hockey players are custom-engineered by materials scientists so that the boots and blades meet the demands for each sport. NSF-funded scientists Melissa Hines, Director of the Cornell University Center for Materials Research, and Sam Colbeck, formerly of the U.S. Army Cold Regions Lab, explain, along with U.S. Olympic hockey player Julie Chu, short track speed skater J.R. Celski, and figure-skater Rachael Flatt.

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